bridge: DBusException also transports the twisted failure condition

src/bridge/DBus.py

@@ -57,6 +57,11 @@ class DeferredNotAsync(dbus.DBusException):
 
 class GenericException(dbus.DBusException):
     def __init__(self, twisted_error):
+        """
+
+        @param twisted_error (Failure): instance of twisted Failure
+        @return: DBusException
+        """
         super(GenericException, self).__init__()
         try:
             # twisted_error.value is a class
@@ -64,7 +69,11 @@ class GenericException(dbus.DBusException):
         except TypeError:
             # twisted_error.value is an instance
             class_ = twisted_error.value.__class__
-            self.args = (twisted_error.getErrorMessage(),)
+            message = twisted_error.getErrorMessage()
+            try:
+                self.args = (message, twisted_error.value.condition)
+            except AttributeError:
+                self.args = (message,)
         self._dbus_error_name = '.'.join([const_ERROR_PREFIX, class_.__module__, class_.__name__])